build(deps): Bump com.github.seeseemelk:MockBukkit-v1.20

Bumps [com.github.seeseemelk:MockBukkit-v1.20](https://github.com/MockBukkit/MockBukkit) from 3.19.2 to 3.39.0.
- [Commits](MockBukkit/MockBukkit@v3.19.2...v3.39.0)

---
updated-dependencies:
- dependency-name: com.github.seeseemelk:MockBukkit-v1.20
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

build.gradle.kts

@@ -35,7 +35,7 @@ dependencies {
     val rushyApiVersion = "2.1.0"
     val commandApiVersion = "9.1.0"
     val coroutineVersion = "1.7.3"
-    val mockBukkitVersion = "3.19.2"
+    val mockBukkitVersion = "3.39.0"
     val junitVersion = "5.10.0"
     val mockkVersion = "1.13.7"
     val kotestVersion = "5.7.1"